PROBLEM:  (QAR 73496, QAR 73514)    (Patch ID: OSF500-001)
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In rare cases the rc.config or rc.config.common files can be corrupted
if the system is shutdown or halted without syncing the disks after
rcmgr updates to either of these files. This changes forces all rcmgr
updated to use syncronous I/O operations when updating these files.